
#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

int _testmain();

void swap_numbers(int *a, int *b);

TEST_CASE("swap swaps two different values", "[swap]") {
    int x = 10, y = 20;
    swap_numbers(&x, &y);
    REQUIRE(x == 20);
    REQUIRE(y == 10);
}

TEST_CASE("swap swaps two equal values", "[swap]") {
    int x = 5, y = 5;
    swap_numbers(&x, &y);
    REQUIRE(x == 5);
    REQUIRE(y == 5);
}

TEST_CASE("swap swaps negative and positive values", "[swap]") {
    int x = -7, y = 42;
    swap_numbers(&x, &y);
    REQUIRE(x == 42);
    REQUIRE(y == -7);
}

TEST_CASE("swap swaps zero and non-zero values", "[swap]") {
    int x = 0, y = 100;
    swap_numbers(&x, &y);
    REQUIRE(x == 100);
    REQUIRE(y == 0);
}

test.cpp

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Challenge: Swap Two Variables Using Pointers

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